I really hate when you are driving behind someone who is clearly distracted, driving slowly, swaying, speeding up. You can just tell by the way they keep turning their head that they are chatting away to the person in the passenger seat, laughing away. They seem totally oblivious to the fact that there are other drivers on the road.
It only takes a second to cause a crash, or for a kid to run out in front of you, or you not to notice a light change. Why risk it by taking your eyes off the road. Yep, that’s what annoys me!